A 807 Invalid combination of shopper interaction and recurring contract response after trying to perform a recurring payment means that you provided a wrong shopper interaction for the recurring contract.
To troubleshoot double check the following things:
- Confirm that you are passing in the shopperInteraction object. Note that, by default the shopperInteraction is set to Ecommerce. This means if it is not passed in One-click payments might be successful without shopperInteraction object.
- Additionally, confirm that you are passing in the correct value for the shopperInteraction object. For One-click payments the shopperInteraction should be set to Ecommerce, for Recurring payments it should be set to ContAuth.